JPS61790U - Sealed lightning arrester - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

Figure 1 is a side sectional view showing a conventional sealed lightning arrester using a non-linear resistor, and Figure 2 is a side sectional view showing a conventional sealed lightning arrester shown in Figure 1, in which an AC voltage is constantly applied to the non-linear resistor used in the conventional sealed lightning arrester. Figure 3 is a side sectional view of a sealed type arrester showing one embodiment of this invention, Figure 4 is an equivalent circuit regarding the capacitance generated in the enclosed type arrester of Figure 3. Figure 5 is a graph showing the potential distribution with respect to the AC voltage constantly applied to the unit and therefore the non-linear resistor used in the sealed lightning arrester of this invention shown in Figure 3, and Figure 6 is a graph showing the potential distribution with respect to the AC voltage constantly applied to the unit and non-linear resistor used in the sealed lightning arrester of this invention shown in Figure 3. It is a side sectional view of a sealed lightning arrester showing an example. In the figure, 1 is a grounded tank, 3 is a non-linear resistor, A, B and C are non-linear resistor units, 5 is a high-voltage conductor, 7 is a high-voltage cylindrical conductor, 8 is a first coaxial cylindrical shield, and 9 is a first coaxial cylindrical shield. 2 coaxial cylindrical shields, 10 is a third coaxial cylindrical shield, X is a bottom plate portion of each coaxial cylindrical shield, and Y is a cylindrical portion of each coaxial cylindrical shield.

Claims (1)

[Scope of utility model registration request] A grounded tank, an insulating gas with high dielectric strength filled inside this grounded tank, a high voltage conductor connected to the power equipment to be protected, and a non-linear resistance placed between this high voltage conductor and the grounded tank. In a sealed lightning arrester comprising a large number of serially connected non-linear resistors having excellent characteristics and large capacitance, and a high-voltage cylindrical conductor inserted between the high-voltage conductor and the non-linear resistor. , a first coaxial cylindrical shield and at least one second coaxial cylindrical shield each having a bottom plate portion inserted between the plurality of units by dividing the plurality of nonlinear resistors into a plurality of units; A cylindrical part formed integrally with the bottom slope part of the first coaxial cylindrical shield extends close to and at least surrounds the high voltage cylindrical conductor, and is integral with each bottom slope part of the at least one second coaxial cylindrical shield. A cylindrical part formed in a cylindrical part extends close to and surrounds at least a part of the cylindrical part one above the cylindrical part, and further has a bottom plate part penetrated by and connected to the high voltage conductor. 3 coaxial cylindrical shields are provided, and a cylindrical part formed integrally with the bottom plate part of the third coaxial cylindrical shield extends close to the cylindrical part of the first coaxial cylindrical shield so as to surround at least a part of it. A sealed lightning arrester characterized by: